How to Solar Power Your Home / House #3 – How to size your solar power system

In this video I discuss sizing your solar power system as well as in particular taking losses into account. More aspects as well as information on my forum right here: http: / / …Video clip Rating: 4 / 5

25 Comments

He is correct about the batteries if you use a low voltage battery system..

IE: 48 volt or 24 Volt, BAD deal,,, to get 80% or better storage out of
your batteries you need a 120volt battery system. Also it helps to keep
your panels cool, splash water on them and you will see the difference.
15/20%﻿

Hi MJ, I don’t know if anyone has pointed this out previously, but you
can’t add percentages together to come up with the total power loss. You
have to consider the power loss over each item. For example, a 40% loss on
100 units leaves 60 units. A further 25% loss (on 60units) leaves 45 units.
However, you added the percentages together which would have given the
result as 65% loss leaving only 35 units. So the overall losses are not
quite as bad as you calculated. Hope this helps.﻿

Really nice videos and I really appreciate your hard work put in here, but
I see a mathematical flaw in this video. When you add up percentage losses
you just sum it up like 2%+10%+5%+3%+7%+30%=57%, but that is wrong, because
if let’s say you have 100W of energy – 2% power tolerance = 98W, then 98W
gets 10% heat loss = 88,2, then 88,2 – 5% because of dirt = 83,79, then
those 83,79W go through wires and loses 3% more and go down to 81,28 then –
7% = 75,6W – 30% (batteries) = 52,9W left (100 – 52,9 = 47,1W and 47,1%
lost from 100), so instead of sum of 57% this should be around 47,1%. You
just can not sum up %, because your next loss will always lose some part
only from that amount which is left from previous losses not from full
primary amount. It can look like a little mistake, but sometimes numbers
can differ radically if you just sum up percentages, just imagine if you
have four losses of 25% each in a row, then by adding up you get 0 energy
left, but in reality there is still 31,64% of starting energy left after it
goes through all those four losses of 25% in a row.﻿

I dont understand what if i live in South cali and i have a 1000Watt System
and its around 80F or 100 on a high in the summer what would my loss be if
they get hit by the sun from Noon – 7 at night please Help Let me know if
you need more info ﻿

My critique, trying to help. Maybe purely on a sales type, than arguing.
From a base point, depicting energy production from a max, descending to
various “losses”, sounds technical, but it’s (sorry) you habitual way of
deducing life decisions. That’s only to say, it’s personal to you, not
universal. That “cup half full” thing, basically. That is to say, without
solar you are at ZERO. Therefore, 0 is the starting point, & ALL energy
production exist in positive terms. The only “loss” of energy, is drawing
from the grid. 1,000 watts isn’t a 30% loss, it’s a 1,000% increase from
non solar. If the conditions only produce that much, it’s not a loss;
unless you convince yourself it is. Compare it to drawing from the grid,
that might help. I like this though. We, humanity, needs this; people like
you. Thanks.﻿

I have a portable solar generator I bought from Solutions From Science. It
has 2 – 100 watt panels and 3 – 80 AH batteries. I was trying to get it to
run a chest freezer and a battery backup sump pump charger, it provided
power for both of them for about 3 days when it showed the batteries
starting to weaken. the unit can be expanded up to 4- 100 panels and 4 – 80
AH batteries. Just was trying to figure out how much power I can get from
this setup without using the AC charger the unit comes with to charge the
batteries. Thanks for the video !﻿

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after I managed to build … I could not believe that I’m thinking to sell
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*aboutsolarcells.comxa.* *com* will learn how and what to do and will also
help if you need it… good luck to everyone﻿

Commercial Solar Panels are too Expensive !!
If you want a Cheap solution to Power your Home.
You have to Learn to Build your Own Solar Panels
Go to *Google* and *Search* for:
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Choose the First Result (Skip the advertisement on top)
It is a Blog that Explains it in Details…..﻿

If you don’t have an electric grid to earn credit on you could use that
spare energy make Bitcoins then spend them instead. As they charge 15p in
the UK but only pay 5p for your production, it still works out better to
turn the excess energy into Bitcoins!﻿

Hello MjLorton.
I am facing a problem. My array size is 29kW and my grid tie size is
37kW(array size +30%). I cant find a suitable grid tie converter for this
size and i am wodering can i use multiple grid tie converters attaches to
the same solar panel system. For example 4 grid tied connectors with a
rating of 11,500 W tied together.

Just get here and see what people are talking here. Thank you for the
video. It is brilliant. I am not quite professional on the solar power and
the info on the internet is not as detail as I think. I find a nice way to
learn it that is learning it from the specification. OKorder provides me a
nice way to learn it.﻿